Heat exchanger for superchargers



Feb. s, 1944. E M YOUNG 2,340,853 HEAT EXGHANGER FOR SUPERCHARGERS FiledJune 27, 1941 v 2 Sheets-Sheet 1 A T TO/YEY Feb. 8, 1944. F. M. YOUNG,2,340,853

HEAT EXCHANGER FOR SUPRCHARGERS Filed June .27, 1941 2 Sheets-Shet 2 /2OOO @C 06Go Q O O G 0 00g 0000@ /NVEHTOQ F250 yOU/YG ATTORNEY PatentedFeb. 8, 1944 UNITED STATES PATE-NT OFFICE HEAT EXCHANGEB FORSUPERCHARGEBS Fred M. lloung, Racine, Wis. A

Application June 27, 1941, Serial No. 399,969 -1 claim. (ci. 2st-24s)The present invention relates to air coolers particularly adapted foruse on airplanes equipped with a supercharger.

Objects of the present invention are to provide a device which isstrong, eillcient, durable and extremely light in weight.

- moved and header covers II-II are placed into Further objects of myinvention are to provide a device which is simple, easily manufacturedand assembled and easily installed.

Still further objects of the present invention are to provide a devicefrom which some of the parts can be used on various sized units andwherein all or the larger part of the device may be made from aluminumsheets and commercial aluminum tubes.

To these and other useful ends, my invention consists of parts,combinations of parts, or their equivalents, and mode of operation, ashereinafter set forth and claimed and shown in the accompanying drawingsin which:l

Fig., 1 is a front elevational view of the preferred embodiment of myinvention.

Fig. 2 is a top View of the design shown in Figure 1 less the headercovers.

Fig. 3 is an end view of the device as shown-in Figure 2.

Fig. 4 is a transverse sectional view taken on line 4-4 of Figure l.

Fig. 5 is a fractional section taken on line 5-5 of Figure 2. Fig. 6 isa section similar to Figure 5 but illustrating a modication. l

Fig. 7 is a fractional longitudinal section taken on line I-'I of Figure2 but including a fraction of the header cover.

As thus illustrated. the end tube plates It-Iil are made from thickaluminum sheets. Intermediate plates I2 are provided, which may besomewhat thinner than plates IIJ. Plates I and I2 are provided withclosely spaced registering apertures through which tubes il extend, asillustrated.

I provide top and bottom plates I3 having end and side flanges I4.Plates III and I2 on their top and bottom' edges and the adjacentflanges Il are provided with spaced apertures forv the reception ofbolts I5. l

Temporary bolts I are used for securing plates I0 to their flanges lessthe header caps. After bolts I5 are made taut, the tubes are expandedinto their openings in the tube plates, so as to firmly anchor the tubesin the plates. The preferred method for this-operationis by the ballsystem which is too well known to require further description. A

position and made fast by means of bolts I8, the

Afront `and rear edges of plates I0 and the front and rear edges ofheader covers I'I are also provided with apertures for the reception ofbolts I8 (see Figure 1) It will be seen that the header covers will bsecurely -fastened to plates I0 and that plates.

I0 and I2 wlllbe securelyfastened together by means of members I3 and Iland the tubes.

Header covers II are preferably shaped as illustrated and provided withsuitable inlet and outlet openings I9-I9. These openings may beoperatively connected to the supercharger and inlets leading to theengine (not shown) so the heated air, after it leaves the superchargerpasses through tubes II and will be cooled by the blast of air forcedaround the tubes, as will hereinafter appean provided (not shown) andsuitably secured to flanges Il or suitable ducts may be secured to thefront and rear flanges, one leading to a suitable air supply means thusother than frontal pressure may be provided for forcing an air blastthrough the device.

It will be noted that the plates are relatively closely spaced and thatthey cooperate with members I3 to form a number of air ducts throughwhich tubes II extend.

In devices of this type, it is desired that the air be forced throughthese air ducts at high velocity so as ao increase the heat exchangecapacity of the device. It has been found that if the exposed part ofthe tube is very long, the action of the air will cause seriousvibration `and in time destroy the tubes. invention is to extend thetubes through narrow ducts so the length exposed to the blast of airwill not be great enough to permit vibration.

It will be seen by scrutinizing the various figures that members I3 arepositioned in close proximity to the top and bottom rows of tubes, the.space being such as will permit about the same volume of air to passbetween plates I3 and the adjacent tubes as will be caused to passbetween the tubes. Thus the device will be eicient without the necessityof providing air locks, etc.

In Figure 6, I illustrate a modliication wherein intermediate plates-24are provided with tube apertures which are somewhat iarger than the Anobject of this or synthetic rubber sleeves 25.

, tubes tightly held in the sleeves.

apertures shown in the other figures. They are made suitable for thereception of iinaged rubber The sleeves are designed so the tubes willflt tightly in the sleeves and in turn the sleeves will be held tightlyin their apertures.

I provide a temporary tapered plug 28 in the ends of the tubes and thetubes are then forced into the assembly longitudinally, member 26 actingto permit the `tube to enter the sleeve by expanding the opening in thesleeve so members 25 will be tightly held in their openings and theAfter completion of the assembly, the ends of the tubes may be expandedin the apertures in end tube plates i0 in any well known manner.

An object of sleeves 25 is to form a suitable anchorage for the medialportion of the tubes and avoid the necessity of expanding the entirelength of the tubes as already described.

Clearly members I3 may be used on two different width assemblies andthese members may also be used on various length assemblies, andassemblies with various numbers of air ducts.

' against movements relative to the tube plates,

flanged plates positioned between opposite edges of said end andintermediate plates and co-operating therewith to form separate airducts through which the tubes extend, flanges of said flanged platesilatly engaging sides of the end and intermediate plates at their edgesoutwardly of said tubes, and bolts extending through said flanges andplates wherebysaid tubes and flanged plates are intimately securedtogether.

' FRED M. YOUNG.l

